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Setting up the PIMPLE algorithm correctly

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Old   August 28, 2018, 10:32
Default Setting up the PIMPLE algorithm correctly
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benoit favier
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Hello,

I am trying to setup a case of "reactingFoam" on openfoam 6.
I read this tutorial on the pimple algorythm. If i understand correctly, the solver is supposed to stop doing "Outercorrector" loops once the residual reaches a certain point.

However, in my case, it always does the maximum number of "Outercorrector" loops regardless of my residual tolerance.

My "fvSolution" file is the following.

Code:
solvers
{
    "rho.*"
    {
        solver          diagonal;
    }
    p
    {
        solver          PCG;
        preconditioner  DIC;
        tolerance       1e-6;
        relTol          0.;
    }
    
    pFinal
    {
        $p;
        tolerance        1e-6;
        relTol           0.;
    }
    "(U|h|k|omega)"
    {
        solver          PBiCGStab;
        preconditioner  DILU;
        tolerance       1e-6;
        relTol          0.;
    }
    
    "(U|h|k|epsilon)Final"
    {
        $U;
        relTol          0;
    }
    Yi
    {
        solver          PBiCGStab;
        preconditioner  DILU;
        tolerance       1e-6;
        relTol          0.;
    }
}
PIMPLE
{
    nNonOrthogonalCorrectors 0;
    nCorrectors          2;
    nOuterCorrectors    50;
 
    OuterCorrectorResidualControl
    {
        "(U|p)" 
         {
              tolerance       1.E-4; 
              relTol          0.; 
         } 
    }
}

relaxationFactors
{
    fields
    {
        p               0.4;
    }
    equations
    {
        U               0.4;
        k               0.9;
        e               0.9;
        ".*"            0.9;
    }
}
What did'nt I understand here ?
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Old   August 28, 2018, 14:03
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It should be outerCorrectorResidualControl -- with the lowercase "o". See this tutorial for reference : https://github.com/OpenFOAM/OpenFOAM...tem/fvSolution.

Caelan
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Old   August 29, 2018, 03:30
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benoit favier
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Thank you.
OpenFoam should really warn when there are useless elements in a dictionnary.

But then it tells me some strange things at the begining of a simulation :
Code:
PIMPLE: No convergence criteria found

PIMPLE: Corrector convergence criteria found
        "(U|p|h)": tolerance 0.001, relTol 0
        Calclations will do 5 corrections if the convergence criteria are not met
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Old   August 29, 2018, 11:25
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For what it's worth I see the same double message at the top of my log file. The convergence monitoring works just fine though.

Caelan
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Old   August 29, 2018, 15:58
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Ok, thank you for your help
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